Fibrous nanosilica spheres KCC-1@NH2 as highly effective and easily retrievable catalyst for the synthesis of chromenes

Oboudatian, Hourieh Sadat; Safaei‐Ghomi, Javad

doi:10.1007/s11164-022-04695-9

Cited by 7 publications

(3 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…KCC-1 possesses a range of desirable properties, including a high surface area, ordered porosity, and thermal stability [5,6]. These characteristics make it an attractive platform for the immobilization of catalytically active species, such as metal oxides.…”

Section: Introductionmentioning

confidence: 99%

Unraveling FeOx Nanoparticles Confined on Fibrous Mesoporous Silica Catalyst Construction and CO Catalytic Oxidation Performance

Li,

Feng,

Luo

et al. 2024

Catalysts

View full text Add to dashboard Cite

Catalytic oxidation is used to control carbon monoxide (CO) emissions from industrial exhaust. In this study, a mesoporous silica material, KCC-1, was synthesized and used as a carrier with a high specific surface area to confine active component FeOx nanoparticles (NPs), and the CO catalytic oxidation performance of x%Fe@KCC-1 catalysts (x represents the mass loading of Fe) was studied. The experimental results showed that due to its large specific surface area and abundant mesopores, the FeOx NPs were highly dispersed on the surface of the KCC-1 carrier. The particle size of FeOx was very small, resulting in strong interactions between FeOx NPs and KCC-1, which enhanced the catalytic oxidation reaction on the catalyst. The FeOx loading improved the CO adsorption capability of the catalyst, which facilitated the catalytic oxidation of CO, with the 7%Fe@KCC-1 catalyst achieving 100% CO conversion at 160°C. The CO catalytic removal mechanism was investigated by a combination of in-situ DRIFTS and DFT calculations. This study advances scientific understanding of the application potential of nano-catalysts in important oxidation reactions and provides valuable insights into the development of efficient CO oxidation catalysts.

show abstract

Section: Introductionmentioning

confidence: 99%

Unraveling FeOx Nanoparticles Confined on Fibrous Mesoporous Silica Catalyst Construction and CO Catalytic Oxidation Performance

Li,

Feng,

Luo

et al. 2024

Catalysts

View full text Add to dashboard Cite

show abstract

“…Nanomaterials based on silica (as support) not only have been used in catalysis processes [ 1 , 7 , 12 – 16 ], but also have extensive applications in different industries; e.g., they have been applied as multimodal imaging agent [ 17 ], multifunctional additive for enhanced lubrication [ 18 ], drug delivery tools for skin cancer (melanoma) treatment [ 19 ] and adsorbent [ 20 ], and for upcycling waste plastics to fabricate lightweight, waterproof and carbonation resistant cementitious materials [ 21 ], degradation of antibiotic in aqueous solution [ 22 ] and targeted cancer therapy [ 23 ].…”

Section: Introductionmentioning

confidence: 99%

Preparation of a novel nanocatalyst based on rice husk-derived nano-silica and its application for the synthesis of pyrano[2,3-d]pyrimidine-2,4-diones and pyrano[2,3-d]pyrimidine-4-one-2-thiones

Zare

Izadi

2023

Res Chem Intermed

View full text Add to dashboard Cite

A novel nanomaterial was prepared via grafting an organic moiety containing 4,4′-bipyridine scaffold on rice husk-derived nano-silica (RH-SiO 2 ). The nanomaterial namely 1-(Si-pr)-[4,4′-bipyridine]-1,1ʹ-diium hydrogen sulfate grafted on RH-SiO 2 ( SPBHRS ) was characterized by FT-IR, XRD, EDX, FE-SEM and TGA analyses. Afterward, the synthesis of pyrano[2,3- d ]pyrimidine-2,4-diones and pyrano[2,3- d ]pyrimidine-4-one-2-thiones was performed through the one-pot multi-component reaction of aromatic aldehyde, malononitrile and barbituric acid (or 2-thiobarbituric acid) using SPBHRS as an efficient and recyclable catalyst. Graphical abstract Supplementary Information The online version contains supplementary material available at 10.1007/s11164-023-05021-7.

show abstract

“…Therefore, most of its internal surface area is accessible for guest materials, provides unusually high activity in catalysis. In addition, it has been widely accepted as an ideal candidate for carrier various nanomedical material owing to its high speci c surface area, good biocompatibility, low toxicity, brous morphology, good thermal/hydrothermal properties, high mechanical stability and easy surface modi cation, which has been extensively used in numerous fundamental research and practical applications [1][2][3]. The amorphous nature of the concentric bers of KCC-1 and the abundance of surface silanol groups lead to a hydrophilic surface and low its catalytic activity.…”

Section: Introductionmentioning

confidence: 99%

Internally cross-linked wrinkled fibrous silica nanocomposite by bipyridinum dichloride bridge: an efficient catalyst in the synthesis of α,β-unsaturated diketones

Nasseri,

Kiasat

2023

Preprint

View full text Add to dashboard Cite

In this research, we designed a novel internally cross-linked wrinkled fibrous organo-silica nanocomposite containing bivalent organic cationic bridges in the framework. For this gold, bivalent organosilane bridging agent, Si(OEt)3-BiPy+22Cl--Si(OEt)3 was easily prepared through nucleophilic substitution reaction of (3-chloropropyl) triethoxysilane and bipyridine. In the next step, silanated bivalent cationic bipyridinium dichloride bridge was introduced into the pore walls of dendritic fibrous nanostructured silica through a sol−gel process under open-vessel reflux conditions. The obtained heterogeneous hybrid nanocomposite, KCC-1-Bipy+22Cl-, was characterized by FT-IR, EDX, TGA, and FE-SEM. The rationale was that such wrinkled fibrous, due to its abundant pores and slits, would acts as nanoreactor and would be an excellent catalyst in organic transformation due to the presence of quaternary ammonium units into the pore walls. Owing to the fact that the α-β-unsaturated carbonyl compounds can further be used in the synthesis of valuable intermediates, the catalytic ability of the nanocomposite was tested in the C=C bond formation reaction via Knoevenagel condensation of aldehyde and active methylene compounds under solvent free conditions. In addition to convenience, utilization of the catalyst with high catalytic activity and good reusability, makes this method as an interesting option for facile and efficient synthesis of α,β-unsaturated diketones derivatives.

show abstract

Fibrous nanosilica spheres KCC-1@NH2 as highly effective and easily retrievable catalyst for the synthesis of chromenes

Cited by 7 publications

References 52 publications

Unraveling FeOx Nanoparticles Confined on Fibrous Mesoporous Silica Catalyst Construction and CO Catalytic Oxidation Performance

Unraveling FeOx Nanoparticles Confined on Fibrous Mesoporous Silica Catalyst Construction and CO Catalytic Oxidation Performance

Preparation of a novel nanocatalyst based on rice husk-derived nano-silica and its application for the synthesis of pyrano[2,3-d]pyrimidine-2,4-diones and pyrano[2,3-d]pyrimidine-4-one-2-thiones

Internally cross-linked wrinkled fibrous silica nanocomposite by bipyridinum dichloride bridge: an efficient catalyst in the synthesis of α,β-unsaturated diketones

Contact Info

Product

Resources

About